The abnormal constituent of urine is albumin. Urea, creatinine, and sodium are all normal components of urine. Urea is a waste product formed in the liver from the breakdown of proteins, while creatinine is a waste product formed by the breakdown of creatine in muscles. Sodium is a common electrolyte found in urine. However, the presence of albumin in urine signals a potential problem. Albumin is a protein normally found in the blood, and its presence in urine can indicate kidney damage or dysfunction. Normally, the kidneys filter out waste products like urea and creatinine while keeping essential substances like proteins in the blood. When albumin leaks into the urine, it suggests that the kidney`s filtration system is not working properly. Thus, albuminuria, or the presence of albumin in urine, is considered an abnormal finding.